/************************************************************************
Copyright 2003, 2004, 2005, 2006, 2007, 2008 Grid Technology Research Center,
National Institute of Advanced Industrial Science and Technology.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
************************************************************************/

package jp.aist.gtrc.plus.reserve;


class ReserveOperator extends ReserveUpdateOperator {

	ReserveOperator(ReserveManager rsvMgr, ReserveNodeNormalizer normalizer,
			AbortOperator aborter) {

		super(rsvMgr, normalizer, aborter);

	}

	private ReserveId makeNewRerserveId() throws ReserveException {

		if (table.size() > (ReserveId.MAX_ID - ReserveId.MIN_ID + 1)) {
			// rsvId is in [MIN_ID, ..., MAX_ID],
			// we can contain (MAX_ID-MIN_ID+1) reserves.
			throw new ReserveException("too many reserves, cannot reserve more");
		}

		ReserveId id = new ReserveId();
		while (table.containsId(id)) {
			id = new ReserveId();
		}
		return id;

	}

	final ReserveId reserve(ReserveRequest rsvReq) throws ReserveException {

		ReserveNodeSet rsvNodeSet = null;
		ReserveId rsvId = null;
		ReserveInfo rsvInfo = null;

		startCurrentOperation(ReserveOperation.getReserveInstance());

		try {
			rsvNodeSet = makeReserveNodeSet(rsvReq);
			rsvId = makeNewRerserveId();
			rsvInfo = rsvMgr.newReserveInfo(rsvId, rsvReq, rsvNodeSet);

			getCurrentOperation().setTargetReserveInfo(rsvInfo);
			rsvMgr.addNewReserveInfo(rsvInfo);

			reallocateNodes(rsvReq.getStartTime());

			commitAfter1stPhaseSuccess();
			logger.debug("reserved: " + rsvInfo);
		} catch (ReserveException e) {
			abortWithoutException(rsvInfo);
			throw e;
		} catch (RuntimeException e2) {
			abortWithoutException(rsvInfo);
			throw e2;
		}

		return rsvId;

	}
}
